functions PLEASE HELP ME!!!!!!!!!

Use a graphing calculator to graph the function and visually determine the intervals on which the function is increasing, decreasing, or constant.
I have a TI84 Plus calculator and have no clue how to graph this.
f(x)= 4x, x<2
f(x)= 8, 2<x<6
f(x)= (-1/2x)+11 x>6

Use a graphing calculator to graph the function and visually determine the intervals on which the function is increasing, decreasing, or constant.
I have a TI84 Plus calculator and have no clue how to graph this.
f(x)= 4x, x<2
f(x)= 8, 2<x<6
f(x)= (-1/2x)+11 x>6

Hello,

I've attached a serie of screenshots which shows the steps what you have to do:

As you can see you add the domain of the piece of a function in brackets to the term of the piece of function which has to be put in brackets too.

1. Yscl = 1. This value is covered by the cursor.

2. The graph which is drawn by the calculator is wrong: The vertical parts have to be removed. (I don't know how to get the calculator to stop this nonsense )

Use a graphing calculator to graph the function and visually determine the intervals on which the function is increasing, decreasing, or constant.
I have a TI84 Plus calculator and have no clue how to graph this.
f(x)= 4x, x<2
f(x)= 8, 2<x<6
f(x)= (-1/2x)+11 x>6

Hello,

as you certainly have recognized at once the graph in my previous post was completely wrong. I did your problem again - and finally the calculator delivered a correct graph.

Only to show you where I made the mistake I don't delete my previous post. There are only minor changes but they are obviously necessary.